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They are driven to Milford Haven, where they are loaded on to a factory ship which cooks and freezes them en-route to Asia.

In some past investigations, the NTSB, such as in the 2008 sinking of the Alaska Ranger factory ship, has reached a different probable cause of the sinking of a vessel.

The Coast Guard begins two weeks of hearings Monday into what caused the flooding that sank a Washington-based factory ship off Alaska, forcing the evacuation of its crew of 46.

Take, for example, the skull of a southern right whale that arrived in the museum's collections in 1938 by way of the factory ship Ulysses.

But only Japan continues to sail a fleet of ships half way across the globe to hunt whales in the Antarctic and maintains a large factory ship that can process hundreds of whales at sea.